CHARGE

Built on the finite element drift-diffusion method, CHARGE provides designers with the correct tools for comprehensive charge transport simulation in active photonic and optoelectronic semiconductor devices. CHARGE self-consistently solves the system of equations describing electrostatic potential (Poisson’s equations) and density of free carriers (drift-diffusion equations). Automatic and guided mesh refinement tools are provided to achieve accuracy while minimizing computational effort.

Key Applications

• Photovoltaic devices

• Electro-optic modulators

• Image sensors

• Semiconductor devices

• Avalanche photodiodes

Except for below applications, you can find more examples onApplication Gallery

Key Features

Finite Element IDE

1D/2D/3D modeling
Import STL, GDSII, and STEP
Parameterizable simulation objects
Domain partitioned solids for easy property definition
Geometry-linked sources and monitors
Automatic mesh refinement based on geometry, materials, doping, refractive index, and optical or heat generation

Comprehensive Material Models

Flexible visual database
More than 500 customizable electronic and thermal properties and models for accurate simulation of complex effects
Scriptable material properties

Charge Transport Solver

2D/3D finite element Poisson/drift-diffusion solver
Steady-state, small signal AC and transient simulation
Isothermal, non-isothermal, electro-thermal simulation
Comprehensive semiconductor material models
Includes electrical, optical, and thermal stimuli
Automated finite element mesh generation based on doping, optical, and thermal profiles

Self-consistent Charge/Heat Modeling

Self-heating effects
High-current devices
Requires both CHARGE and HEAT licenses

Highly integrated interoperable solvers

Self-consistent charge and heat transport simulation
Perform multiphysics simulations
Photovoltaic (FDTD/DGTD, CHARGE & HEAT)
Electro-optic (CHARGE & FDTD/DGTD/FDE)